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Bounds transforms.

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This commit is contained in:
Tim Schaub
2012-06-21 19:58:35 +02:00
parent 6198df9381
commit 948e792ddd
3 changed files with 114 additions and 0 deletions
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36
test/spec/ol/Bounds.test.js
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@@ -29,5 +29,41 @@ describe("ol.Bounds", function() {
});
});
describe("transforming bounds", function() {
var gg = new ol.Projection("EPSG:4326");
var sm = new ol.Projection("EPSG:900913");
var bounds = new ol.Bounds(10, -10, 20, 10, gg);
// approximate bbox array
function bbox(bounds) {
var mult = Math.pow(10, 6); // six figs
return [
Math.round(bounds.getMinX() * mult) / mult,
Math.round(bounds.getMinY() * mult) / mult,
Math.round(bounds.getMaxX() * mult) / mult,
Math.round(bounds.getMaxY() * mult) / mult
];
}
it("doesn't mind a null transform", function() {
var trans = bounds.transform(new ol.Projection("foo"));
expect(bbox(bounds)).toEqual([10, -10, 20, 10]);
});
it("transforms from geographic to spherical mercator", function() {
var trans = bounds.transform(sm);
expect(bbox(trans)).toEqual([1113194.907778, -1118889.974702, 2226389.815556, 1118889.974702]);
});
it("transforms from spherical mercator to geographic", function() {
var trans = bounds.transform(sm);
var back = trans.transform(gg);
expect(bbox(back)).toEqual([10, -10, 20, 10]);
});
});
});